[catapult] - Copy Telemetry's gsutilz over to third_party.

third_party/gsutil/third_party/pyasn1-modules/tools/pkcs8dump.py

Index: third_party/gsutil/third_party/pyasn1-modules/tools/pkcs8dump.py
diff --git a/third_party/gsutil/third_party/pyasn1-modules/tools/pkcs8dump.py b/third_party/gsutil/third_party/pyasn1-modules/tools/pkcs8dump.py
new file mode 100755
index 0000000000000000000000000000000000000000..d1d125f8ccb7141f1688e9902071f73a7be500e4
--- /dev/null
+++ b/third_party/gsutil/third_party/pyasn1-modules/tools/pkcs8dump.py
@@ -0,0 +1,41 @@
+#!/usr/bin/python
+#
+# Read  bunch of ASN.1/PEM plain/encrypted private keys in PKCS#8 
+# format on stdin, parse each into plain text, then build substrate from it
+#
+from pyasn1.codec.der import decoder, encoder
+from pyasn1_modules import rfc5208, pem
+import sys
+
+if len(sys.argv) != 1:
+    print("""Usage:
+$ cat pkcs8key.pem | %s""" % sys.argv[0])
+    sys.exit(-1)
+    
+cnt = 0
+
+while 1:
+    idx, substrate = pem.readPemBlocksFromFile(sys.stdin, ('-----BEGIN PRIVATE KEY-----', '-----END PRIVATE KEY-----'), ('-----BEGIN ENCRYPTED PRIVATE KEY-----', '-----END ENCRYPTED PRIVATE KEY-----') )
+    if not substrate:
+        break
+
+    if idx == 0:
+        asn1Spec = rfc5208.PrivateKeyInfo()
+    elif idx == 1:
+        asn1Spec = rfc5208.EncryptedPrivateKeyInfo()
+    else:
+        break
+
+    key, rest = decoder.decode(substrate, asn1Spec=asn1Spec)
+
+    if rest: substrate = substrate[:-len(rest)]
+        
+    print(key.prettyPrint())
+
+    assert encoder.encode(key, defMode=False) == substrate or \
+           encoder.encode(key, defMode=True) == substrate, \
+           'pkcs8 recode fails'
+        
+    cnt = cnt + 1
+    
+print('*** %s PKCS#8 key(s) de/serialized' % cnt)